IBM 5150 PC

Just curious - I don't know if I ever saw a Microsoft branded version of MASM 1.0 - I have the complete IBM "Macro Assembler by Microsoft" package, which is packaged in a pink PC format binder with about an inch thickness of paper - I've saw a lot of products in that era with much worse documentation. The manual states that it's "First Edition (December 1981) and the MASM executable spits out: ----------------------------------------- The IBM Personal Computer MACRO Assembler Version 1.00 (C)Copyright IBM Corp 1981 ----------------------------------------- Is this essentially the same assembler that is being discussed? There are two assemblers in the package, ASM which is without macros and requires 64k and MASM which does support macros and requires 96k - someone scoffed at this, but it seems reasonable to provide a limited version for a very small memory footprint system (many vendors did this in the days of limited memory). It does state that if you have 96k you can run either assembler, so I don't think it has anything to do with needing to architect if differently for different amounts of memory. We used this package a lot in some early PC product development, and I do recall that it was slow and had a number of quirks, but we did produce a lot of working code with it. I also recall that when we upgraded to MASM 4 is was *much* better (in fact I still have it installed and use it from time to time). -- dave09 (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.classiccmp.org/dunfield/index.html